5-methyl-N-(3-(trifluoromethyl)phenyl)isoxazole-4-carboxamide|5-Methyl-N-[3-(trifluoromethyl)phenyl]-4-isoxazolecarboxamide|5-Methyl-N-[3-(trifluoromethyl)phenyl]-4-isoxazolecarboxamide ;|Leflunomide Imp. E (EP)|Leflunomide Related Compound C;|Leflunomide USP RC C|N-(3'-Trifluoromethylphenyl)-5-methylisoxazole-4-carboxamide